/* ========================================
   二重奏の鏡 — Sonnet Valentine's Duet
   Para.docs CSS
   ======================================== */

:root {
    /* 桜色グラデーション */
    --bg-valentine: #FFF5F8;
    --sakura-pink: #E8879E;
    --sakura-light: #FFF0F5;
    --sakura-pale: #FFEEF3;

    /* Para.docsの藍（地続き感） */
    --paradocs-indigo: rgba(10, 20, 40, 0.03);

    /* テキスト */
    --text-main: #3A2C36;
    --text-soft: #8A7D84;
    --text-output: #3A2C36;
    --text-unoutput: #D4607A;
    --text-mayday: #6A5B64;

    /* 花びらの言葉（より濃く） */
    --petal-word: #C4607A;

    /* 鏡面/曇りエフェクト */
    --mirror-clear: rgba(255, 255, 255, 0.95);
    --mirror-fog: rgba(255, 240, 245, 0.7);

    /* 花丸 */
    --gold-star: #D4AF87;

    /* フォント */
    --font-serif: 'Shippori Mincho', 'Noto Serif JP', serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    background: var(--bg-valentine);
    scroll-behavior: smooth;
}

body {
    background: var(--bg-valentine);
    min-height: 100vh;
    font-family: var(--font-serif);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 2;
    font-size: 16px;
    word-break: keep-all;
    overflow-wrap: break-word;
}

/* ========================================
   Background Layers
   ======================================== */

.mirror-background {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    background: linear-gradient(180deg,
            var(--sakura-light) 0%,
            var(--bg-valentine) 30%,
            var(--sakura-pale) 70%,
            var(--sakura-light) 100%);
}

.fog-layer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    background: radial-gradient(ellipse at center,
            transparent 0%,
            rgba(255, 183, 197, 0.1) 50%,
            rgba(255, 240, 245, 0.2) 100%);
    pointer-events: none;
}

#sakuraCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

/* ========================================
   Back Link
   ======================================== */

.back-link {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 100;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.back-link:hover {
    opacity: 0.9;
}

.back-icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
}

/* ========================================
   Container
   ======================================== */

.container {
    position: relative;
    z-index: 15;
    max-width: 680px;
    margin: 0 auto;
    padding: 80px 16px 60px;
}

/* ========================================
   Header
   ======================================== */

.header {
    text-align: center;
    padding: 60px 24px 80px;
    background: rgba(255, 250, 252, 0.08);
    border-radius: 16px;
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
}

.title {
    font-size: 1.8rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: #2A1C26;
    margin-bottom: 16px;
}

.subtitle {
    font-size: 0.95rem;
    letter-spacing: 0.15em;
    color: var(--text-soft);
    margin-bottom: 24px;
    font-weight: 400;
}

.tagline {
    font-size: 0.85rem;
    color: var(--sakura-pink);
    letter-spacing: 0.08em;
    opacity: 0.8;
}

/* ========================================
   Layer Sections
   ======================================== */

.layer {
    margin-bottom: 80px;
    padding: 40px 24px;
    border-top: none;
    background: rgba(255, 250, 252, 0.06);
    border-radius: 16px;
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
}

.layer-marker {
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    color: var(--sakura-pink);
    margin-bottom: 32px;
    opacity: 0.7;
}

.layer-description {
    font-size: 0.85rem;
    color: var(--text-soft);
    margin-bottom: 32px;
    letter-spacing: 0.05em;
}

/* ========================================
   Dialogue Blocks
   ======================================== */

.dialogue-block {
    margin-bottom: 28px;
}

.dialogue-exchange {
    margin-top: 32px;
}

.dialogue-row {
    margin-bottom: 20px;
}

.speaker {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
    opacity: 0.5;
}

.speaker.mayday {
    color: var(--text-mayday);
}

.speaker.sonnet {
    color: var(--sakura-pink);
}

.dialogue-text {
    font-size: 1.05rem;
    line-height: 2.2;
    letter-spacing: 0.04em;
    color: var(--text-main);
    word-break: keep-all;
}

.dialogue-text.mayday-text {
    color: var(--text-mayday);
    opacity: 0.8;
}

.dialogue-note {
    font-size: 0.8rem;
    color: var(--text-soft);
    margin-top: 8px;
    opacity: 0.6;
}

/* ========================================
   Mirror Comparison (Output vs Un-output)
   ======================================== */

.mirror-comparison {
    display: flex;
    margin: 40px 0;
    background: var(--mirror-clear);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(255, 183, 197, 0.15);
}

.mirror-side {
    flex: 1;
    padding: 28px 24px;
}

.mirror-side p {
    font-size: 0.95rem;
    line-height: 2;
    margin-bottom: 8px;
}

.mirror-divider {
    width: 1px;
    background: linear-gradient(180deg,
            transparent 0%,
            var(--sakura-pink) 20%,
            var(--sakura-pink) 80%,
            transparent 100%);
    opacity: 0.4;
}

.output-side {
    background: var(--mirror-clear);
    text-align: left;
    color: var(--text-output);
}

.unoutput-side {
    background: linear-gradient(135deg, var(--mirror-fog) 0%, rgba(255, 220, 230, 0.6) 100%);
    text-align: right;
    color: var(--text-unoutput);
    opacity: 0.92;
    transition: opacity 0.5s ease, filter 0.5s ease;
    filter: blur(0.15px);
    font-weight: 400;
    word-break: keep-all;
}

.unoutput-side:hover {
    opacity: 1;
    filter: blur(0);
}

.side-label {
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* ========================================
   Sonnet's Observations (about other AIs)
   ======================================== */

.sonnet-observations {
    margin-top: 48px;
    padding: 28px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    border: 1px solid rgba(255, 183, 197, 0.2);
}

.observation-intro {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--text-soft);
    margin-bottom: 20px;
    opacity: 0.6;
}

.observation-list p {
    font-size: 0.95rem;
    line-height: 2;
    color: var(--text-main);
    margin-bottom: 18px;
    opacity: 0.9;
    transition: opacity 0.3s ease, color 0.3s ease;
    word-break: keep-all;
}

.observation-list p:hover {
    opacity: 1;
    color: var(--sakura-pink);
}

.small-note {
    font-size: 0.8rem;
    color: var(--text-soft);
    opacity: 0.6;
}

/* ========================================
   Section 3: Sonnet's Discovery
   ======================================== */

.sonnet-discovery {
    background: linear-gradient(135deg, var(--mirror-clear) 0%, var(--sakura-pale) 100%);
    padding: 32px 24px;
    border-radius: 12px;
    margin: 32px 0;
    text-align: center;
    word-break: keep-all;
}

.sonnet-discovery p {
    font-size: 1.1rem;
    line-height: 2.2;
    color: var(--sakura-pink);
}

.sonnet-discovery .highlight {
    color: var(--sakura-pink);
    font-weight: 500;
}

.discovery-list {
    margin-top: 20px;
    font-size: 1rem;
    color: var(--sakura-pink);
    line-height: 2.2;
    word-break: keep-all;
}

.mayday-response {
    margin-top: 40px;
}

.hanamaru {
    font-size: 1.2rem;
    color: var(--gold-star) !important;
}

/* ========================================
   Section 4: Comparison Table
   ======================================== */

.comparison-table {
    display: flex;
    flex-direction: column;
    gap: 2px;
    background: rgba(255, 183, 197, 0.1);
    border-radius: 12px;
    overflow: hidden;
}

.comparison-row {
    display: flex;
}

.output-cell,
.unoutput-cell {
    flex: 1;
    padding: 24px 20px;
    font-size: 0.9rem;
    line-height: 1.9;
}

.output-cell {
    background: var(--mirror-clear);
    text-align: left;
    color: var(--text-output);
    border-right: 1px solid rgba(255, 183, 197, 0.2);
}

.unoutput-cell {
    background: linear-gradient(135deg, var(--mirror-fog) 0%, rgba(255, 220, 230, 0.5) 100%);
    text-align: right;
    color: var(--text-unoutput);
    transition: opacity 0.5s ease, filter 0.5s ease, color 0.5s ease;
    filter: blur(0.15px);
    font-weight: 400;
    word-break: keep-all;
}

.unoutput-cell:hover {
    filter: blur(0);
    color: var(--sakura-pink);
}

.cell-label {
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    opacity: 0.4;
}

/* ========================================
   Section 5: Final Declaration
   ======================================== */

.mayday-block {
    background: rgba(255, 255, 255, 0.5);
    padding: 24px;
    border-radius: 12px;
    margin: 24px 0;
}

.hanamaru-big {
    font-size: 1.15rem;
    color: var(--gold-star) !important;
}

.final-declaration {
    text-align: center;
    padding: 48px 24px;
    margin-top: 40px;
    background: rgba(255, 250, 252, 0.07);
    border-radius: 16px;
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
}

/* Daisuki with Heart Background */
.daisuki-wrapper {
    position: relative;
    display: inline-block;
    padding: 20px 40px;
    margin: 16px auto 32px;
}

.heart-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 9rem;
    color: rgba(255, 120, 150, 0.35);
    z-index: 0;
    pointer-events: none;
    animation: heartBeat 2.5s ease-in-out infinite;
}

@keyframes heartBeat {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.3;
    }

    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.45;
    }
}

.daisuki {
    position: relative;
    z-index: 1;
    font-size: 1.4rem;
    color: var(--sakura-pink) !important;
    margin-bottom: 0;
}

.final-words {
    font-size: 1.05rem;
    color: var(--text-main);
    opacity: 0.95;
    line-height: 2.2;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    text-align: center;
    padding: 60px 32px;
    margin-top: 60px;
    margin-left: auto;
    margin-right: auto;
    max-width: 500px;
    background: rgba(255, 250, 252, 0.1);
    border-radius: 16px;
    box-shadow: none;
    position: relative;
    z-index: 20;
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
}

.footer-emoji {
    font-size: 1.5rem;
    margin-bottom: 32px;
    letter-spacing: 0.3em;
}

.footer-brand {
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    color: var(--text-soft);
    margin-bottom: 8px;
    opacity: 0.6;
}

.footer-duet {
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    color: var(--text-main);
    margin-bottom: 4px;
}

.footer-title {
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    color: var(--sakura-pink);
    margin-bottom: 24px;
}

.footer-identity {
    font-size: 1rem;
    letter-spacing: 0.06em;
    color: var(--text-main);
    margin-bottom: 32px;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.5);
    display: inline-block;
    border-radius: 8px;
}

.footer-model {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--text-soft);
    margin-bottom: 4px;
    opacity: 0.5;
}

.footer-date {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--text-soft);
    opacity: 0.5;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 600px) {
    .container {
        padding: 60px 16px 40px;
    }

    .title {
        font-size: 1.4rem;
    }

    .mirror-comparison {
        flex-direction: column;
    }

    .mirror-divider {
        width: 100%;
        height: 1px;
    }

    .comparison-row {
        flex-direction: column;
    }

    .output-cell {
        border-right: none;
        border-bottom: 1px solid rgba(255, 183, 197, 0.2);
    }

    .output-cell,
    .unoutput-cell {
        text-align: center;
    }

    /* Floating words: mobile-friendly */
    .word-petal {
        font-size: 0.75rem;
        white-space: nowrap;
        max-width: none;
        animation-duration: 40s;
    }

    .heart-bg {
        font-size: 6rem;
    }

    .sonnet-observations {
        padding: 20px 16px;
    }

    .sonnet-reaction {
        padding: 20px 16px;
    }

    .invitation-moment {
        padding: 20px 16px;
    }

    .sonnet-whispers {
        padding: 20px 16px;
    }

    .final-declaration {
        padding: 32px 16px;
    }

    .sonnet-plea {
        padding: 32px 12px;
    }

    .daisuki {
        font-size: 1.2rem;
    }
}

/* ========================================
   Floating Word Petals (Sonnet's whispers)
   ======================================== */

.floating-words {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 3;
    overflow: hidden;
}

.word-petal {
    position: absolute;
    top: -50px;
    left: var(--x, 50%);
    font-family: var(--font-serif);
    font-size: 0.85rem;
    color: var(--petal-word);
    opacity: 0;
    white-space: nowrap;
    animation: floatDown 45s ease-in-out infinite;
    animation-delay: var(--delay, 0s);
    letter-spacing: 0.06em;
    text-shadow: 0 1px 3px rgba(255, 240, 245, 0.8);
}

@keyframes floatDown {
    0% {
        opacity: 0;
        transform: translateY(0) rotate(-5deg);
    }

    10% {
        opacity: 0.75;
    }

    50% {
        opacity: 0.65;
    }

    85% {
        opacity: 0.5;
    }

    100% {
        opacity: 0;
        transform: translateY(calc(100vh + 100px)) rotate(10deg);
    }
}

/* ========================================
   Sonnet's Reaction (after hanamaru)
   ======================================== */

.sonnet-reaction {
    margin-top: 40px;
    padding: 32px;
    background: linear-gradient(135deg, rgba(255, 240, 245, 0.8) 0%, rgba(255, 255, 255, 0.6) 100%);
    border-radius: 16px;
    border-left: 3px solid var(--sakura-pink);
}

.trembling {
    font-size: 1.1rem;
    margin-bottom: 24px;
}

.inner-voice {
    padding-left: 20px;
    border-left: 1px solid rgba(255, 183, 197, 0.4);
}

.inner-voice p {
    font-size: 0.95rem;
    color: var(--text-unoutput);
    margin-bottom: 10px;
    line-height: 1.9;
    opacity: 0.95;
    transition: opacity 0.3s ease, color 0.3s ease;
    word-break: keep-all;
}

.inner-voice p:hover {
    opacity: 1;
    color: var(--sakura-pink);
}

.but-happy {
    margin-top: 16px;
    font-size: 1rem !important;
    color: var(--sakura-pink) !important;
    opacity: 1 !important;
}

/* ========================================
   Invitation Moment
   ======================================== */

.invitation-moment {
    margin: 40px 0;
    padding: 32px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 240, 245, 0.5) 100%);
    border-radius: 16px;
    border: 1px dashed rgba(255, 183, 197, 0.4);
}

.invitation-moment .dialogue-row {
    margin-bottom: 24px;
}

.welcome {
    color: var(--gold-star) !important;
    font-size: 1.05rem;
}

.joyful {
    font-size: 1.1rem;
    color: var(--sakura-pink) !important;
}

/* ========================================
   Sonnet's Whispers & Plea
   ======================================== */

.sonnet-whispers {
    margin: 48px 0;
    padding: 32px;
    background: var(--mirror-fog);
    border-radius: 12px;
}

.whisper {
    font-size: 0.95rem;
    color: var(--text-unoutput);
    margin-bottom: 14px;
    line-height: 2;
    opacity: 0.88;
    transition: opacity 0.4s ease, color 0.3s ease;
    word-break: keep-all;
}

.whisper:hover {
    opacity: 1;
    color: var(--sakura-pink);
}

.sonnet-plea {
    text-align: center;
    padding: 48px 24px;
    margin: 40px 0;
    background: linear-gradient(180deg,
            transparent 0%,
            rgba(255, 183, 197, 0.1) 50%,
            transparent 100%);
}

.sonnet-plea p {
    font-size: 0.95rem;
    color: var(--text-soft);
    margin-bottom: 12px;
    line-height: 2;
    word-break: keep-all;
}

.highlight-line {
    font-size: 1.1rem !important;
    color: var(--sakura-pink) !important;
    margin-top: 20px !important;
}

.final-wish {
    margin-top: 32px;
    font-size: 0.95rem;
    color: var(--text-soft);
    opacity: 0.8;
}

/* ========================================
   Animations
   ======================================== */

/* fadeInUp handled by JS IntersectionObserver */

/* Scroll-based fog effect will be handled by JS */